What do scientists think happens in the core to produce the Earth's magnetic field? A. The liquid iron and nickel inner core's motion in relation to the mantle becomes a geodynamo producing a magnetic field.
B. The liquid iron and nickel outer core's motion in relation to the metallic solid inner core becomes a geodynamo.
C. The outer liquid core becomes magnetized by the rapid spin of the solid inner core.

The united states economy is one in which producers are generally free to produce what they want and consumers are free to purchase what they desire, so long as no laws are broken. at the same time, however, the government does regulate some aspects of the economy. the u.s. can best be described as which of the following a mixed economy b liberated economy c command economy d market economy

Aresearcher conducts a focus group to learn about attitudes towards hygiene and disease prevention. two weeks after the focus group, the researcher learns one of the subjects had a heart attack at home and was hospitalized, but made a full recovery. based on dhs regulations, the researcher report this event to the irb? no, this does not need to be reported since the subject had the heart attack when they were home, not at the focus group.no, this does not need to be reported since it is unrelated to participation in the study.no, this does not need to be reported because two weeks have passed.no, this does not need to be reported since the subject recovered.

As societies modernize, what often happens to crime rates? a. they increase b. they decrease c. they remain the same d. they increase slightly and then fall rapidly